package com.xxxx.seckill.utils;

import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.stereotype.Component;

/**
 * @author heyanfeng
 * @version 1.0
 * @description:  MD5加密工具类
 * @date 2022/7/29 14:02
 */
@Component
public class MD5Util {
    public static String md5(String src){
        return DigestUtils.md5Hex(src);
    }


    private static final String salt="1a2b3c4d" ;

    /**
     * 第一次加密，前端的加密数据
     * @author yanfeng
     * @date 2023-02-07
     * @param inputPass
     * @return
     */
    public static String inputPassToFromPass(String inputPass) {
        String str = "" +salt.charAt(0) + salt.charAt(2) + inputPass + salt.charAt(5) + salt.charAt(4);
        return md5(str);
    }

    /**
     * 第二次加密，放入数据的加密数据
     * @author yanfeng
     * @date 2023-02-07
     * @param formPass
     * @param salt
     * @return
     */
    public static String formPassToDBPass(String formPass,String salt) {
        String str = "" +salt.charAt(0) + salt.charAt(2) + formPass + salt.charAt(5) + salt.charAt(4);
        return md5(str);
    }

    /**
     * 从前端传来的密码，直接转换为可存入数据库的加密数据
     * @author yanfeng
     * @date 2023-02-07
     * @param inputPass
     * @param salt
     * @return
     */
    public static String inputPassToDBPass(String inputPass, String salt) {
        String fromPass = inputPassToFromPass(inputPass);
        String dbPass = formPassToDBPass(fromPass, salt);
        return dbPass;
    }

    public static void main(String[] args) {
        //d3b1294a61a07da9b49b6e22b2cbd7f9
        System.out.println(inputPassToFromPass("123456"));
        System.out.println(formPassToDBPass("d3b1294a61a07da9b49b6e22b2cbd7f9", "1a2b3c4d"));
        System.out.println(inputPassToDBPass("123456", "1a2b3c4d"));
    }
}
